JP7110991B2 - Equipment inspection system, equipment inspection method and program - Google Patents

Description

The present invention relates to an equipment inspection system, an equipment inspection method and a program, and more particularly to an equipment inspection system, an equipment inspection method and a program for inspection of equipment.

Predetermined work such as welding and painting is performed in a vehicle body processing factory using equipment such as industrial robots. Equipment performs predetermined operations using components such as motors, brakes, and reduction gears. In such equipment, maintenance work (maintenance work or inspection work) is performed to prevent unintentional stoppage of the equipment during operation.

In relation to the above technology, Patent Literature 1 discloses a maintenance work interval determination device capable of determining a maintenance work interval capable of suppressing degradation of maintenance quality when actual failure occurrence timing fluctuates. The maintenance work interval determination device according to Patent Document 1 sets a number matching condition in which the difference between the number of assumed failures and the number of actual failures is set in advance for the failure distribution, which is a statistical distribution that is assumed to follow the failure rate in the facility. Determine whether or not the conditions are met. Then, the maintenance work interval determination device according to Patent Document 1 determines the maintenance work interval in the facility based on the failure distribution determined to satisfy the condition for matching the number of cases.

JP 2016-224862 A

Depending on the components (parts, etc.) of the facility, the magnitude of the impact that a failure of the component has on the operation of the facility may differ. For example, once a component fails, it may take a long time to restore the facility. For such a component, the magnitude of the above influence is large. On the other hand, in some cases, it may not take much time to restore the equipment even if another component fails, or it may not be necessary to perform inspection work until the periodical replacement time. For such a component, the magnitude of the above influence is small. If the failure of a component greatly affects the operation of the facility, the importance of inspection of that component increases. On the other hand, if the failure of a component has a small effect on the operation of the equipment, the importance of inspection is low.

On the other hand, in Patent Literature 1 described above, the importance of inspection of each of the component parts that make up the facility is not taken into consideration. Therefore, there was a possibility that the inspection of the component parts of the facility could not be performed at an appropriate timing.

The present invention provides an equipment inspection system, an equipment inspection method, and a program capable of creating an inspection plan for inspecting component parts of equipment at appropriate timings.

An equipment inspection system according to the present invention includes an index acquisition unit that acquires at least one influence index indicating the degree of influence that a failure of a component of equipment has on the operation of the equipment; and an inspection timing determination unit that determines the inspection timing of the component part according to the importance.

Further, the equipment inspection method according to the present invention acquires at least one influence index indicating the degree of influence that a failure of a constituent part of the equipment has on the operation of the equipment, and inspects the constituent part based on the influence index. is determined, and the timing for inspection of the component parts is determined according to the importance.

Further, the program according to the present invention comprises the steps of: acquiring at least one influence index indicating the degree of influence that a failure of a component of equipment has on the operation of the equipment; and a step of determining the inspection timing of the component parts according to the importance.

As described above, according to the present invention, an inspection plan is created in consideration of the importance of inspection of each component of the facility, so that an inspection plan can be created in which each component is inspected at an appropriate timing. It becomes possible. In other words, it is possible to create an inspection plan that lengthens the inspection cycle for components that do not require a long inspection cycle, and shortens the inspection cycle for components that require a short inspection cycle. It becomes possible.

Preferably, each time a failure occurs in the component part, the index acquisition unit acquires the influence index, and the inspection timing determination unit updates the inspection timing of the component part.
With such a configuration, it is possible to suppress excessive inspection exceeding the necessary frequency when the degree of the impact index is lowered due to the improvement of the maintenance activities of the equipment.

Preferably, each time a failure occurs in the component, the importance determination unit updates the importance of the component.
With such a configuration, it is possible to suppress excessive inspection exceeding the necessary frequency when the degree of the impact index is lowered due to the improvement of the maintenance activities of the facility.

In a preferred embodiment, the candidate calculation unit calculates a candidate for inspection timing based on the predicted timing of failure of the constituent part, and the inspection timing determination unit determines whether the importance is equal to or lower than a predetermined rank. and when the predetermined periodical replacement time for the component comes earlier than the candidate for the inspection time, the component is excluded from the inspection items.
By configuring in this way, it is possible to suppress the inspection of component parts that hardly need to be inspected, so that it is possible to improve the efficiency of the inspection work.

Further, preferably, the impact index includes a first index relating to the time required for restoration of the facility having the component when the component fails, and a timing of the next failure after replacement of the component. and a second indicator relating to the operating time of said equipment having said component up to.
The first index and the second index are indices that are generally used for managing the availability and reliability of facilities. Therefore, by using these first and second indicators as impact indicators, it is possible to more easily determine the importance of inspection.

According to the present invention, it is possible to provide an equipment inspection system, an equipment inspection method, and a program capable of creating an inspection plan for inspecting component parts of equipment at appropriate timings.

1 is a diagram showing an equipment inspection system according to Embodiment 1; FIG. 2 is a functional block diagram showing the configuration of each device of the facility inspection system according to Embodiment 1; FIG. 4 is a diagram exemplifying predictor information according to the first embodiment; FIG. 4 is a diagram exemplifying a failure history according to the first embodiment; FIG. 4 is a flow chart showing an equipment inspection method executed by the equipment inspection system according to the first embodiment; 4 is a diagram illustrating an importance determination chart according to the first embodiment; FIG. 4 is a flow chart showing processing executed by an inspection timing determination unit according to the first embodiment; FIG. 4 is a flow chart showing processing when adding an inspection item for a component in the first embodiment; FIG. 9 is a flow chart showing an equipment inspection method executed by the equipment inspection system according to the second embodiment; FIG. 11 is a diagram illustrating an importance determination chart according to the second embodiment; FIG.

(Embodiment 1)
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. For clarity of explanation, the following descriptions and drawings are omitted and simplified as appropriate. Moreover, in each drawing, the same elements are denoted by the same reference numerals, and redundant description is omitted as necessary.

FIG. 1 is a diagram showing an equipment inspection system 1 according to the first embodiment. Moreover, FIG. 2 is a functional block diagram showing the configuration of each device of the facility inspection system 1 according to the first embodiment. The facility inspection system 1 has a plurality of facilities 10 , a control device 100 and a management device 200 . The equipment inspection system 1 is provided, for example, in a factory having a plurality of processing steps. As will be described later, the facility inspection system 1 is configured to determine the inspection timing (inspection period) of the component parts of the facility 10 . Here, once the "inspection cycle" is determined, the next inspection time is virtually uniquely determined. Therefore, determining the "inspection cycle" means determining the "inspection time".

The facility 10 is, for example, equipment such as an industrial robot. In the embodiment shown below, an example in which the facility 10 is an industrial robot will be described. However, the facility 10 is not limited to industrial robots.

The control device 100 may be provided for each of the multiple pieces of equipment 10 . At least one management device 200 may be provided in the equipment inspection system 1 . For example, the control device 100 is communicably connected to the equipment 10 via a wire or radio. Also, the management device 200 is communicably connected to the control device 100 via a wire or radio, for example. The control device 100 performs processing necessary to control the operation of the corresponding facility 10 . The management device 200 performs processing necessary to create inspection plans for each of the plurality of facilities 10 . Therefore, the management device 200 functions as an inspection plan creation device.

The facility 10 is installed, for example, in the vicinity of a vehicle manufacturing line. The facility 10 is, for example, a robot for performing predetermined work such as welding (for example, spot welding) and painting (for example, intermediate coating or top coating) on vehicles. Equipment 10 has one or more arms 12 . Arm 12 has one or more joints 14 . The joint 14 has a motor device 20 . The motor device 20 has a motor 22 that drives the joint 14 and a reduction gear 24 that transmits the power of the motor 22 to the joint 14 . The motor device 20 also has a brake 26 that brakes the rotation of the motor 22 . Furthermore, the motor device 20 has an encoder 28 that detects the rotation angle of the motor 22 . The control device 100 operates the joint 14 by controlling the operation of the motor 22 and the brake 26 . Accordingly, the equipment 10 is configured to perform desired operations. In other words, the equipment 10 according to the first embodiment is a joint-driven robot that operates by driving the joints 14 . Also, the arm 12 , the joint 14 and the motor device 20 are components of the facility 10 . Additionally, motor 22 , motor bearings (not shown), reducer 24 , brake 26 and encoder 28 are components of installation 10 .

The control device 100 has a function as a computer, for example. The control device 100 may be mounted inside the equipment 10 or may be connected to the equipment 10 via a wire or radio so as to be communicable. The control device 100 may be a control panel or operation panel installed near the facility 10 . In this case, the control device 100 is also a component of the installation 10 . The control device 100 includes a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, an I/O (Input/Output) 104, and a UI (User Interface) 105 as hardware. have.

The CPU 101 functions as a processing device (processor) that performs control processing, arithmetic processing, and the like. The ROM 102 has a function as a storage that stores control programs and arithmetic programs executed by the CPU 101 . The RAM 103 has a function as a memory that temporarily stores processing data and the like. The I/O 104 is an input/output device that inputs data and signals from the outside such as the facility 10 or the management device 200 and outputs data and signals to the outside. The UI 105 includes an input device such as a keyboard and an output device such as a display. Note that the UI 105 may be configured as a touch panel in which an input device and an output device are integrated. Also, the UI 105 may be a remote controller that is physically independent of the control device 100 configured by a control panel or the like and connected to the CPU 101 or the like of the control device 100 by wire or wirelessly. Note that the ROM 102 is configured to store an operation program (teaching data) for controlling the equipment 10 .

The management device 200 functions as a computer, for example. The management device 200 can be installed, for example, in a central monitoring room of a factory where the equipment inspection system 1 is installed. The management apparatus 200 has CPU201, ROM202, RAM203, I/O204, and UI205 as hardware.

The CPU 201 functions as a processing device (processor) that performs control processing, arithmetic processing, and the like. The ROM 202 has a function as a storage that stores control programs and arithmetic programs executed by the CPU 201 . The RAM 203 has a function as a memory that temporarily stores processing data and the like. The I/O 204 is an input/output device that inputs data and signals from outside such as the control device 100 and outputs data and signals to the outside. The UI 205 includes an input device such as a keyboard and an output device such as a display. Note that the UI 205 may be configured as a touch panel in which an input device and an output device are integrated.

As shown in FIG. 2 , the control device 100 has an equipment control section 110 , a measurement data acquisition section 112 , a data processing section 114 , a data output section 116 and an inspection support section 120 . The inspection support unit 120 has an inspection plan display unit 122 and a failure information input unit 124 . A description of the function of each component of these control devices 100 will be given later.

Each component of the control device 100 shown in FIG. 2 can be implemented by the CPU 101 executing a program stored in the ROM 102 . Further, the control device 100 may record necessary programs in any non-volatile recording medium, and install the programs as necessary. Note that each component of the control device 100 shown in FIG. 2 is not limited to being implemented by software as described above, and may be implemented by hardware such as some circuit element.

Also, one or more of the components of control device 100 shown in FIG. 2 may be realized by a device other than control device 100 . For example, the inspection support unit 120 may be realized by a device other than the control device 100 (for example, a portable terminal such as a tablet terminal carried by a maintenance worker of the facility 10). In other words, the device that controls the facility 10 and acquires necessary data and information and the device that supports the inspection work of the facility 10 may be physically separate devices.

As shown in FIG. 2 , the management device 200 has a symptom management section 210 and an inspection plan creation section 220 . The portent manager 210 has a data storage unit 212 , a portent information generator 214 , and a portent determination unit 216 . The inspection plan creation unit 220 includes a failure information acquisition unit 222, a failure history storage unit 224, an index acquisition unit 226, an importance determination unit 228, a candidate calculation unit 230, an inspection timing determination unit 232, and an inspection plan output. It has a section 234 and a spare part management section 236 . A description of the function of each component of these management devices 200 will be given later.

Note that each component of the management device 200 shown in FIG. 2 can be implemented by the CPU 201 executing a program stored in the ROM 202. FIG. Further, similarly to the control device 100, the management device 200 may store necessary programs in any non-volatile recording medium and install the programs as necessary. As with the control device 100, each component of the management device 200 shown in FIG. good. Also, one or more of the constituent elements of the management device 200 shown in FIG. 2 may be implemented by a device other than the management device 200 (for example, the control device 100).

Next, each component of the control device 100 shown in FIG. 2 will be described.
The equipment control unit 110 controls the operation of the equipment 10 . The equipment control unit 110 may control the equipment 10 according to an operation program (teaching data) stored in the ROM 102 . Specifically, the equipment control unit 110 controls the operation of the motor device 20 of the equipment 10 . In other words, the equipment control unit 110 controls the motor 22 and the brake 26 of the motor device 20 . More specifically, the equipment control unit 110 transmits a command current indicating a command current value, which is a control value (command value), to the motor 22 to operate the motor 22 . The equipment control unit 110 also receives an encoder value indicating the rotation angle of the motor 22 from the encoder 28 . The equipment control unit 110 may rotate the motor 22 by feedback control or the like using the rotation angle indicated by the encoder value so that the joints 14 of the equipment 10 perform predetermined operations. Furthermore, the facility control unit 110 transmits a brake signal (brake release signal) to the brake 26 to release the brake 26 .

The measurement data acquisition unit 112 acquires measurement data measured by the motor device 20 . At this time, the measurement data acquisition unit 112 may acquire the measurement data together with the identification information of the equipment 10 . The measurement data is raw data indicating the operating state of the equipment 10 (motor device 20). Therefore, the measurement data acquisition unit 112 can function as an operation state acquisition unit that acquires the operation state of the equipment 10 . The measurement data are, for example, command current values, brake signals, encoder values, heat generation temperatures, and the like. However, the measurement data are not limited to these values. For example, the measurement data acquisition unit 112 may acquire the motor current value.

The data processing unit 114 processes the measurement data acquired by the measurement data acquisition unit 112 and converts it into predictive management data that can be used for predictive management. The data output unit 116 outputs the predictive management data to the management device 200 . Since the measurement data is acquired in chronological order, the predictive management data indicates the operating state of the facility 10 in chronological order. The sign management data includes, but is not limited to, average command current value, maximum current value, standard deviation, amplitude, suction time, average temperature, and the like.

For example, the data processing unit 114 acquires the average command current value, maximum current value, standard deviation, amplitude, etc. using the command current value. The average command current value is, for example, the average value of the command current values in one cycle of operation of the equipment 10 . Also, the maximum current value is, for example, the maximum command current value in one cycle of operation of the equipment 10 . Also, the standard deviation is, for example, the variation from the average value of the command current values. Also, the amplitude is the amplitude of the command current value (difference between peaks and valleys in one cycle). Note that the data processing unit 114 may acquire the average amplitude value (average value in one cycle of operation of the equipment 10) or the maximum value of amplitude (maximum value in one cycle of operation of the equipment 10).

The average command current value, maximum current value, standard deviation, and amplitude tend to increase as the deterioration of the bearings or gears (reduction gear 24) of the motor device 20 progresses. Accordingly, the average commanded current value, maximum current value, standard deviation and amplitude can be used to manage failure prognostication for bearings or gears that are components of equipment 10 . Here, the term "failure" includes not only the case where a component completely fails to perform its function, but also the case where a malfunction (abnormality) occurs to such an extent that it cannot operate with sufficient performance.

Also, the data processing unit 114 acquires the motor rotation speed using the encoder value. The motor rotation speed can be calculated from the amount of change in the encoder value (rotation angle). Here, the data processing unit 114 calculates the average command current value, maximum current value, standard deviation and amplitude etc. may be obtained. As a result, the influence of fluctuations in the motor rotation speed can be excluded from the average command current value, maximum current value, standard deviation, amplitude, and the like. In other words, the average command current value, the maximum current value, the standard deviation, the amplitude, and the like more reliably indicate the progression of deterioration (symptoms of failure) of each part of the equipment 10 .

Also, the data processing unit 114 acquires the suction time from the brake signal. The suction time is the time from when the brake signal (brake release signal) is transmitted until the brake 26 is actually released and the joints 14 of the equipment 10 become operable. Therefore, the data processing unit 114 uses the difference between the time at which the brake signal is generated and the time at which the equipment 10 is actually operable (for example, the rise time of the encoder value or the rise time of the motor current value) as the suction time. good. Suction time tends to increase as the brake 26 disc wears. Therefore, suction time can be used to manage failure prognostication for the brake 26 component of the equipment 10 .

The inspection support unit 120 has a function for assisting a maintenance worker of the equipment 10 with maintenance work such as inspection of components of the equipment 10 . The inspection plan display unit 122 displays on the UI 105 information about an inspection plan created by an inspection plan creation unit 220, which will be described later. For example, the inspection plan display unit 122 displays on the UI 105 information about the inspection plan to be performed today. Note that when the inspection support unit 120 is provided in the mobile terminal, the inspection plan display unit 122 displays information regarding the inspection plan and the like to be performed today on the UI of the mobile terminal. For example, the inspection plan display section 122 displays components of the equipment 10 to be inspected today.

The failure information input unit 124 receives failure information when the maintenance worker operates the UI 105 . The failure information includes the component where the failure was found, the date, and details of the failure. In other words, when a maintenance worker inspects a certain component and discovers a failure, the failure information input unit 124 inputs failure information. The failure information input unit 124 outputs the input failure information to the management device 200 .

Next, each component of the management device 200 shown in FIG. 2 will be described.
The sign management unit 210 manages a sign that a failure will occur for each component. The data storage unit 212 acquires and stores the predictive management data from the data output unit 116 of the control device 100 . In particular, the data storage unit 212 can store predictive management data relating to a component in which a failure has occurred. It should be noted that the predictor management unit 210 does not need to perform predictive management for all component parts. For example, the predictive management unit 210 may perform predictive management for the brake 26 and not perform predictive management for the speed reducer 24 .

The predictor information generation unit 214 uses the predictor management data to generate predictor information, which is information for managing predictors of failure of each component. The predictor information may include, for example, progression of values of predictor management data representing a predictor of failure of the corresponding component and a threshold of predictive management data at which failure is expected to occur. The portent information generation unit 214 can generate portent information for each component part. For example, assume that a component (eg, brake 26) in a facility 10 (eg, facility #1) fails. In this case, the portent information generation unit 214 generates the progress of the portent management data (for example, sucking time) of the failed component in chronological order, the value of the portent management data when the failure occurred, and the operation of the component. Predictive information is generated from the period from the start of the failure to the occurrence of the failure. Furthermore, when a failure occurs in a component (for example, the brake 26) in another facility 10 (for example, the facility #2), the prediction information may be generated.

FIG. 3 is a diagram exemplifying predictor information according to the first embodiment; The predictive information illustrated in FIG. 3 indicates the progression of predictive management data values for a component from the date of the previous failure (that is, the replacement date of the component) to the predicted failure date when a failure is predicted to occur. graph. The horizontal axis is the date (elapsed time), and the vertical axis is the value of predictive management data (for example, suction time) representing a predictive sign of failure of the corresponding component. Then, using the predictive information (graph) illustrated in FIG. 3, the predictive management data reaches Th on the (N+X) day when X days have passed since the previous failure date N (day), and a failure occurs in the component part. It is predicted that

The predictor determination unit 216 determines a predictor of failure of the same component of a certain facility 10 using predictor information related to a component (for example, the brake 26). For example, using the predictor information illustrated in FIG. 3, it is assumed that a predictor of failure of a component (eg, brake 26) of a certain facility (eg, facility #3) is determined. In this case, the portent determination unit 216 may determine how many more days the failure is predicted to occur from the value of the portent management data (for example, suction time) related to this portent information. In addition, the sign determination unit 216 may determine the predicted failure date from, for example, the number of days of operation of the component.

The inspection plan creation unit 220 (FIG. 2) creates an inspection plan for each component part by the processing described later. The failure information acquisition unit 222 acquires failure information from the control device 100 . The failure history storage unit 224 stores the acquired failure information as a failure history.

FIG. 4 is a diagram exemplifying a failure history according to the first embodiment; In the example of FIG. 4, the failure history is a history of information including identification information indicating the failed component, failure date, and stop period. The stoppage period is the period from when the facility 10 including the failed component is stopped to replace the failed component until it is restored. For example, the failure history illustrated in FIG. 4 indicates that component X1 (component X of facility #1) failed on date t1, and the outage period was T1 (minutes). Further, the failure history illustrated in FIG. 4 indicates that component Y1 (component Y of facility #1) failed on date t2, and the outage period was T2 (minutes). Further, the failure history illustrated in FIG. 4 indicates that component X2 (component X of facility #2) failed on date t3, and the outage period was T3 (minutes). Further, the failure history illustrated in FIG. 4 indicates that component Y2 (component Y of facility #2) failed on date t4, and the outage period was T4 (minutes). The “component X” is the motor 22, for example, and the “component Y” is the brake 26, for example. Note that the failure history may be generated separately for each component. That is, the failure history storage unit 224 may store failure histories separately for each of the motor 22 and the brake 26, for example.

The indicator acquisition unit 226 (FIG. 2) acquires at least one impact indicator. Here, the impact index indicates the degree of impact that a failure of a component has on the operation of the equipment 10 . In the first embodiment, the impact indicators are MTTR (Mean Time To Recovery) and MTBF (Mean Time Between Failures). The MTTR is an index (first index) relating to the time required for restoration of the equipment 10 having the component when the component fails. Also, the MTBF is an index (second index) relating to the operating time of the facility having the component from the time when the component is replaced until the next failure occurs. MTTR and MTBF are metrics commonly used to manage equipment availability and reliability. Therefore, by using MTTR and MTBF as influence indicators, it is possible to determine the importance of inspection more easily (easier for the user to understand).

It should be noted that the case where the MTTR of a certain component is long means that when the component fails, the facility 10 including that component will be out of service for a long period of time. Therefore, when the MTTR is long, it can be said that the failure of the component has a great influence on the operation of the equipment 10, so it can be said that the MTTR is an influence index. That is, the longer the MTTR, the greater the impact index.

Also, if the MTBF of a component is short, that component is likely to fail. Therefore, when the MTBF is short, it can be said that the failure of the component has a great influence on the operation of the equipment 10, so it can be said that the MTBF relates to the influence index. That is, the shorter the MTBF, the greater the degree of its impact index.

Here, MTTR is defined for each component (eg, motor 22 or brake 26). For example, the MTTR of site X is defined by Formula 1 below.
(Formula 1)
MTTR = (Total equipment stoppage period due to failure of component X) / (Number of failures of component X)

Also, MTBF is defined for each component (eg, motor 22 or brake 26). For example, the MTBF of site X is defined by Equation 2 below.
(Formula 2)
MTBF = (Total operating period of equipment from timing when component X failed last time to next timing when component X fails)/(Number of failures of component X)
The operating period of the facility is the period from when the facility recovers after the previous failure of the component X and starts operating until the next time when the component X fails.

The importance determination unit 228 determines the importance of inspection of the component part based on the influence index. The inspection timing determination unit 232 determines the inspection timing of the component part according to the degree of importance. The inspection plan output unit 234 creates and outputs an inspection plan for the component from the determined inspection time. Candidate calculation section 230 also calculates candidates for the inspection timing of the component based on the time when the component is predicted to fail. Specific processing of the index acquisition unit 226, the importance determination unit 228, the inspection timing determination unit 232, the inspection plan output unit 234, and the candidate calculation unit 230 will be described later.

The spare part management unit 236 manages spare parts for each component based on the created inspection plan. For example, the spare part management unit 236 orders a spare part for a component when the inspection time or the periodical replacement time is approaching for that component. In addition, the spare part management unit 236 manages the number of spare parts for each component.

FIG. 5 is a flow chart showing the facility inspection method executed by the facility inspection system 1 according to the first embodiment. The facility inspection system 1 performs the processing shown in FIG. 5 for each component to be managed, for example, each time a failure occurs. Here, the processing shown in FIG. 5 is mainly executed by the inspection plan creation unit 220 of the management device 200. FIG.

When a failure occurs in a component to be managed (YES in step S100), the management device 200 acquires failure information (step S102). Specifically, as described above, the failure information acquisition unit 222 of the management device 200 acquires the failure information of the components (for example, the motor 22 or the brake 26) to be managed in each facility 10 from the control device 100. do. For example, when the component to be managed is the motor 22 , the failure information acquisition unit 222 acquires failure information regarding the motor 22 of each of the multiple pieces of equipment 10 . The failure history storage unit 224 stores the acquired failure history as illustrated in FIG.

Next, the management device 200 calculates MTTR and MTBF for each component (step S104). Specifically, the index acquisition unit 226 of the management device 200 calculates the MTTR and MTBF of the component to be managed as the impact index. Here, when the component to be managed is the motor 22 , the index acquisition unit 226 calculates MTTR and MTBF of the motor 22 .

Here, a method of calculating the MTTR when the component to be managed is the motor 22 will be described. The index acquisition unit 226 totals (accumulates) the stop periods due to the failure of the motor 22 in the failure history. Here, it is assumed that the component X is the motor 22 in the example of FIG. At this time, the motor 22 (component X) failed on failure days t1, t3, t5, and t7, so the index acquisition unit 226 totals the stop periods T1, T3, T5, and T7. Furthermore, in the example of FIG. 4, the number of failures of the motor 22 (component X) is four. Therefore, in this case, the index acquisition unit 226 calculates the MTTR of the motor 22 (component X) from Equation 1 as MTTR=(T1+T3+T5+T7)/4.

Further, a method for calculating the MTBF when the component to be managed is the motor 22 will be further described. The index acquisition unit 226 accumulates the period from when the equipment 10 was restored after the previous failure of the motor 22 and started to operate to when the next failure of the motor 22 occurs in the failure history. Assume that the component X is the motor 22 in the example shown in FIG. At this time, regarding the facility #1, the motor 22 (component X1) fails on failure day t1, and then the motor 22 (component X1) fails on failure day t5. Therefore, for facility #1, the operating period from the previous failure date of the motor 22 to the next failure date is (t5-t1). Similarly, for facility #2, the operating period from the previous failure date of the motor 22 to the next failure date is (t7-t3). Also, in this case, the number of failures is two unless the date of the previous failure is counted. Therefore, in this case, the index obtaining unit 226 calculates the MTBF of the motor 22 (component X) as MTBF={(t5−t1)+(t7−t3)}/2 from Equation (2).

Incidentally, when the failure date t1 is indicated by date and time, the facility #1 fails at t1 and is restored after T1. Therefore, for facility #1, the operating period from the timing when the motor 22 was restored on the previous failure date to the failure timing on the next failure date is (t5-(t1+T1)). Similarly, in this case, for facility #2, the operating period from the timing when the motor 22 was restored on the previous failure date to the timing when the motor 22 failed on the next failure date is (t7-(t3+T3)). Therefore, in this case, the index acquisition unit 226 calculates the MTBF of the motor 22 (component X) as MTBF={(t5−(t1+T1))+(t7−(t3+T3))}/2 from Equation 2. .

Next, the management device 200 determines the importance of inspection for each component (step S106). Specifically, the importance determination unit 228 of the management device 200 determines the importance of inspection of the component to be managed according to MTTR and MTBF. More specifically, the importance determination unit 228 determines the importance using the importance determination chart shown in FIG. Here, as will be described below, the importance is determined such that the greater the degree of the influence index, the greater the importance of inspection of the component parts.

FIG. 6 is a diagram exemplifying an importance determination chart according to the first embodiment. In Embodiment 1, since the importance of inspection of the component parts is determined according to the two influence indicators (MTTR and MTBF), the importance determination chart is two-dimensional. In the importance determination chart shown in FIG. 6, three areas ArA, ArB, and ArC are defined according to the lengths of MTTR and MTBF. Area ArA is an area corresponding to "Rank A" with the highest importance of inspection. Area ArB is an area corresponding to "rank B", which indicates that the importance of inspection is medium. Area ArC is an area corresponding to "rank C" with the lowest importance of inspection. The number of importance ranks is not limited to three as shown in FIG. Here, Tr1 and Tr2 are thresholds in MTTR, and Tr1<Tr2. Tf1 and Tf2 are thresholds in MTBF, and Tf1<Tf2.

Component parts ranked in rank A are, for example, component parts that cannot be repaired during operation of equipment when a failure occurs, and require a long stoppage that greatly affects production management. Or, it is a component that has a very high possibility of failure occurring before the periodical replacement time (time for equipment overhaul). Therefore, it can be said that the component parts ranked in rank A have a large influence on the production activities of the entire factory. Components ranked in rank B are, for example, components that, when a failure occurs, need to be stopped for a period of time that does not affect production management, or components that have the possibility of failure occurring before the periodical replacement period. It is a relatively high component. Therefore, it can be said that the component parts ranked with rank B have less influence on the production activities of the entire factory than the component parts ranked with rank A. Also, component parts ranked in rank C can be repaired while the equipment is in operation (during daily break times, etc.), and there is a possibility that a failure will occur before the periodical replacement period. It is an extremely low component. Therefore, it can be said that the component parts ranked with rank C have less influence on the production activities of the entire factory than the component parts ranked with rank B.

Here, the region ArA is a region in which MTTR is Tr2 or more or MTBF is Tf1 or less. Region ArC is a region where MTTR is less than Tr1 and MTBF exceeds Tf2. Area ArB is an area excluding areas ArA and ArC. For example, when it is calculated that MTTR=MTTR_a (>Tr2) for component X (motor 22) in the process of S104, the importance determination unit 228 ranks the importance of inspection of component X (motor 22) at rank A I judge. In this case, it means that the effect of the equipment 10 on the failure of the component X is large. Further, for example, when it is calculated that MTTR=MTTR_b (<Tr1) and MTBF=MTBF_b (>Tf2) for the component Y (brake 26) in the process of S104, the importance determination unit 228 determines the component Y (brake 26) is determined to be rank C in terms of importance of inspection. In this case, it means that the influence of the equipment 10 on the failure of the component Y is small.

Next, the inspection plan creation unit 220 of the management device 200 determines whether or not failure sign management is being performed for the components to be managed (step S108). For example, it is assumed that the predictor management unit 210 does not perform failure predictive management for component X (motor 22), but performs failure predictive management for component Y (brake 26). In this case, when the component to be managed is the component X, the inspection plan creation unit 220 (for example, the candidate calculation unit 230) determines that failure sign management is not performed (NO in S108). On the other hand, when the component to be managed is the component Y, the inspection plan creation unit 220 (for example, the candidate calculation unit 230) determines that failure sign management is being performed (YES in S108).

If failure sign management is not performed for the component to be managed (NO in S108), the candidate calculation unit 230 calculates the candidate for the inspection cycle (candidate for the inspection cycle) Hn as the MTBF calculated in the process of S104. (Step S110). That is, candidate calculation section 230 sets Hn=MTBF. On the other hand, if failure predictor management is being performed for the components to be managed (YES in S108), the candidate calculation unit 230 calculates the predicted failure date using the predictor information as illustrated in FIG. S112). Then, the candidate calculation unit 230 sets the inspection cycle candidate Hn to the period from the failure prediction date to the previous failure date (step S114). That is, the candidate calculation unit 230 sets Hn=(predicted failure date−previous failure date)=X (days). By doing so, it is possible to determine the inspection timing according to the failure prediction date predicted by the predictive management, so that it is possible to create an inspection plan with higher accuracy.

The management device 200 determines the inspection timing (step S120). Specifically, the inspection timing determination unit 232 determines the inspection timing of the component part according to the importance determined in the process of S106 and the inspection period candidate calculated in the process of S110 or S114. Specific processing of S120 will be described later using FIG.

FIG. 7 is a flow chart showing the process (S120) executed by the inspection timing determination unit 232 according to the first embodiment. The inspection timing determining unit 232 determines whether or not the importance rank determined in the process of S106 is "rank A (importance: high)" (step S122). If the importance rank is rank A (YES in S122), the inspection timing determination unit 232 determines whether the current inspection cycle H0 is longer than the inspection cycle candidate Hn (H0>Hn) ( step S124).

If H0>Hn is not satisfied, that is, if the current inspection cycle H0 is equal to or less than the inspection cycle candidate Hn (NO in S124), the inspection timing determination unit 232 determines H0 as the inspection cycle (step S126). That is, in this case, the inspection timing determination unit 232 does not update the inspection timing. On the other hand, if H0>Hn, that is, if the current inspection cycle H0 is longer than the inspection cycle candidate Hn (YES in S124), the inspection timing determination unit 232 determines Hn as the inspection cycle (step S128). That is, in this case, the inspection timing determination unit 232 updates the inspection timing to Hn. If the rank of importance is rank A, the importance of inspection of this component is high. Therefore, the inspection cycle is determined to be shorter, that is, the shorter one of H0 and Hn.

On the other hand, if the importance rank is not rank A (NO in S122), the inspection timing determining unit 232 determines whether the importance rank determined in the process of S106 is "rank B (importance: medium)". (step S130). When the rank of importance is rank B (YES in S130), the inspection timing determining unit 232 determines the inspection period to be Hn (step S128). That is, when the rank of importance is rank B, the inspection timing determination unit 232 always updates the inspection timing to Hn. In other words, when the importance rank is rank B, the inspection timing determining unit 232 updates the inspection timing to the latest inspection period candidate.

On the other hand, if the rank of importance is not rank B (NO in S130), the rank of importance is "rank C (importance: low)". In this case, the inspection timing determination unit 232 determines whether or not the periodic replacement cycle Hc of the component to be managed is longer than the inspection cycle candidate Hn (Hc>Hn) (step S132). Here, the periodical replacement period Hc is a period predetermined for each component by the manufacturer or the like of the component. If Hc>Hn, that is, if the regular replacement cycle Hc is longer than the inspection cycle candidate Hn (YES in S132), the inspection timing determination unit 232 determines Hn as the inspection cycle (step S128). In other words, in this case, the inspection timing determination unit 232 updates the inspection timing to the latest inspection period candidate.

On the other hand, if Hc>Hn is not true, that is, if the periodic replacement cycle Hc is equal to or less than the inspection cycle candidate Hn (NO in S132), the inspection timing determination unit 232 excludes the component to be managed from the inspection items (step S134). ). The fact that the regular replacement cycle Hc is equal to or less than the inspection cycle candidate Hn means that the predetermined regular replacement timing arrives earlier than the inspection timing candidate. In this case, for this component, the degree of importance of inspection is lower than a predetermined rank (rank C or lower in the example of Embodiment 1), and the predetermined periodic replacement timing is lower than the candidates for inspection timing. It arrives early, so there is little need to inspect its components. For example, it is very likely that a component will be replaced before that component fails. Therefore, this component is excluded from inspection items. As a result, the number of inspection items is reduced, and it is possible to suppress the inspection of components that hardly need to be inspected, thereby making it possible to improve the efficiency of the inspection work.

The management device 200 generates an inspection plan corresponding to the inspection timing determined in S120 for each component, and outputs it to the inspection support unit 120 of the control device 100 (or the mobile terminal of the worker) (step S140). Thereby, the inspection plan display unit 122 displays the inspection plan on the UI 105 (or the UI of the mobile terminal). Specifically, the inspection plan output unit 234 calculates the inspection timing ( (scheduled inspection date). Thereby, the inspection plan output unit 234 creates an inspection plan. Then, the inspection plan output unit 234 outputs a notification to the control device 100 (or the worker's mobile terminal) of the equipment 10 (or the worker's mobile terminal) that includes the component that is due for inspection today, to the effect that the component should be inspected today. do. For example, in the example of FIG. 4, if the scheduled inspection date for the component X1 is today, the inspection plan output unit 234 outputs the control device 100 (or the worker's portable terminal) to the effect that the component X1 should be inspected today.

Then, when a failure occurs in the component to be managed (YES in S100), the management device 200 performs the processes of S102 to S140 again. Specifically, it is assumed that a failure occurs in a component of the same type of equipment that is different from the equipment 10 of the component that failed last time. For example, in the example of FIG. 4, it is assumed that the component X (component X1) of the equipment #1 had a failure last time, and the component X (component X2) of the equipment #2 had a failure this time. In this case, the failure information acquisition unit 222 acquires newly generated failure information about the component X2 from the inspection support unit 120 (S102), and the index acquisition unit 226 calculates MTTR and MTBF (S104). Then, the importance determination unit 228 determines the importance of inspection using the newly calculated MTTR and MTBF (S106), and the inspection timing determination unit 232 determines the inspection timing according to the newly determined importance. is determined (S120). Here, the MTTR and MTBF calculated this time may differ from the MTTR and MTBF calculated last time. Therefore, when a component fails, the importance determination unit 228 updates the importance of inspection of the component, and the inspection timing determination unit 232 updates the inspection timing (inspection cycle) of the component. becomes.

As described above, the equipment inspection system 1 according to the first embodiment determines the importance of inspection of the component parts of the equipment 10 based on the influence indicators such as MTTR and MTBF, and according to the determined importance, the configuration It is configured to determine the inspection timing (inspection cycle) of the part. As described above, in the equipment inspection system 1 according to the first embodiment, an inspection plan is created in consideration of the importance of inspection of each component of the equipment 10, so that each component is inspected at an appropriate timing. It is possible to create such an inspection plan. In other words, it is possible to create an inspection plan that lengthens the inspection cycle for components that do not require a long inspection cycle, and shortens the inspection cycle for components that require a short inspection cycle. It becomes possible.

Further, as described above, the equipment inspection system 1 according to the first embodiment acquires (calculates) the impact index (MTTR and MTBF) each time a failure occurs in a component, and updates the importance of inspection. , inspection cycle (inspection time). Here, the calculated MTTR and MTBF may fluctuate due to improvements in equipment maintenance activities. Specifically, for example, any of a series of operations from stopping the equipment 10 when a component fails, repairing or replacing the component, and restoring (restarting) the equipment 10 is performed. By improving efficiency, MTTR can be shortened. This makes it possible to reduce the degree of the impact indicator for MTTR. Similarly, the MTBF can be lengthened by, for example, improving the reliability of the components by improving the components so that they are less likely to fail. This can reduce the degree of influence index for MTBF. Therefore, improved maintenance activities can lead to better MTTR and MTBF values (ie less impact indicators), making component inspections less critical. This makes it possible to lengthen the inspection cycle. Note that even if the rank of the importance of inspection does not decrease and does not change, the inspection cycle candidate Hn may become longer due to the increase in MTBF, and thus the inspection cycle may become longer.

Considering the safety and reliability of the equipment 10, a shorter inspection cycle seems preferable. However, excessive inspection exceeding the necessary frequency may impede the efficiency of inspection work. On the other hand, the equipment inspection system 1 according to the first embodiment is configured to acquire an influence index and update an inspection cycle (inspection time) each time a failure occurs in a component. For a certain component, an improvement in facility maintenance activities increases the MTBF, and the processing of S110 in FIG. 5 and the processing of S128 in FIG. 7 can lengthen the inspection cycle. Therefore, in Embodiment 1, it is possible to suppress excessive inspection exceeding the necessary frequency. Therefore, in Embodiment 1, it is possible to create an inspection plan that appropriately reflects that the degree of influence index has decreased due to the improvement of maintenance work.

Further, the facility inspection system 1 according to the first embodiment is configured to update the importance of inspection each time a failure occurs in a component. At first, the importance was rank A (importance: high), so it was necessary to shorten the inspection interval, but when it became possible to shorten MTTR and lengthen MTBF, the importance rank may decline. For example, although MTTR was Tr2 or more for a certain component part, the importance rank may be lowered from Rank A to Rank B as MTTR becomes less than Tr2 due to improvement of equipment maintenance activities. In such a case, in the first embodiment, it is possible to determine a long inspection cycle (inspection timing) corresponding to the lowered importance rank. Also, for example, although the importance of a certain component part was rank B, if it becomes possible to shorten the MTTR and lengthen the MTBF due to the improvement of equipment maintenance activities, the importance rank will be changed to B. It can drop to rank C. In such a case, depending on the conditions of S132, the component can be excluded from inspection items. Therefore, in Embodiment 1, it is possible to suppress excessive inspection exceeding the required frequency when the level of the impact index is lowered due to the improvement of equipment maintenance activities.

FIG. 8 is a flow chart showing processing when adding an inspection item for a certain structural part in the first embodiment. First, the inspection plan creating unit 220 adds an inspection item (step S152). Specifically, when a new component is introduced due to, for example, updating the model of the equipment 10, the inspection plan creation unit 220 creates an inspection plan to which inspection items regarding the component are added. At this time, the inspection plan creation unit 220 may associate information (identification information, etc.) on the constituent parts with inspection items.

The inspection plan creating unit 220 determines an inspection period candidate Hn' according to the specifications (step S154). Specifically, the inspection plan creation unit 220 determines an inspection cycle candidate Hn′ based on the inspection cycle shown in the specifications predetermined by the component manufacturer or the like and the service life of the equipment 10 . The service life of the facility 10 can be determined based on the shortest service life among the plurality of component parts that constitute the facility 10 . For example, if the inspection cycle indicated by the specifications of the component parts is shorter than the service life of the equipment 10, the inspection plan creation unit 220 determines the inspection cycle indicated by the specifications of the component parts as an inspection cycle candidate Hn'. may On the other hand, for example, if the inspection cycle indicated by the specifications of the components is longer than the life of the equipment 10, the inspection plan creation unit 220 may determine the life of the equipment 10 as the candidate inspection cycle Hn'.

The inspection plan creation unit 220 determines whether or not the periodic replacement cycle Hc indicated by the specifications of the component parts is longer than the inspection cycle candidate Hn' (step S156). Note that this regular replacement cycle Hc may be the same as the regular replacement cycle Hc shown in FIG. If the regular replacement cycle Hc indicated by the component part specifications is not longer than the inspection cycle candidate Hn' (NO in S156), the regular replacement cycle corresponding to the regular replacement cycle Hc is longer than the inspection period corresponding to the inspection cycle candidate Hn'. The time will come sooner. Therefore, inspection of this component becomes unnecessary. Therefore, the inspection plan creation unit 220 excludes this component from the inspection items (step S158). In other words, no inspection items are registered for this component. For example, the battery of the control panel needs to be replaced every two months, whereas the inspection period of the component parts of the control panel can be adjusted to the inspection period of the control panel, which is longer than two months. be. In such a case, the battery, which is a constituent part of the control panel, can be excluded from inspection items.

On the other hand, if the periodic replacement cycle Hc indicated by the specifications of the component parts is longer than the candidate inspection cycle Hn′ (YES in S156), the inspection plan creation unit 220 sets the candidate inspection cycle Hn′ as the inspection cycle, A new inspection item is created (step S160). Then, if the first failure occurs in that component (YES in step S162), the process proceeds to step S102 in FIG. 5, and the inspection cycle is determined (updated).

(Embodiment 2)
Next, Embodiment 2 will be described. In the second embodiment, the impact index used to determine the importance of inspection differs from that in the first embodiment. Note that the configuration of the facility inspection system 1 according to the second embodiment is substantially the same as that shown in FIG. 2, so description thereof will be omitted.

FIG. 9 is a flowchart showing an equipment inspection method executed by the equipment inspection system 1 according to the second embodiment. The facility inspection system 1 performs the processing shown in FIG. 9 for each component to be managed, for example, each time a failure occurs. Here, the processing shown in FIG. 9 is mainly executed by the inspection plan creation unit 220 of the management device 200. FIG.

When a failure occurs in a component to be managed (YES in step S200), the failure information acquisition unit 222 of the management device 200 acquires failure information (step S202), as in S102 of FIG. The failure history storage unit 224 stores the acquired failure history as illustrated in FIG. Here, the failure information according to the second embodiment includes the work risk rank (work risk rank) for each component in addition to the failure date and outage period for each component as illustrated in FIG. It may also contain risk information. Work risk will be described later. It should be noted that this work risk information can be generated by, for example, being input by a maintenance worker according to a predetermined rule. Therefore, a maintenance worker can input work risk information by operating the UI 105 of the control device 100 (or the UI of the mobile terminal).

Next, the index acquisition unit 226 of the management device 200 acquires MTTR and work risk for each component (step S204). That is, the index acquisition unit 226 according to the second embodiment acquires MTTR and work risk as impact indexes. Note that the method for obtaining (calculating) the MTTR is substantially the same as the method described in Embodiment 1, so description thereof will be omitted.

The work risk is an impact indicator that indicates the degree of risk (degree of difficulty) of maintenance work (maintenance work) for the corresponding component. For example, a heavy component (e.g. speed reducer 24) or a component located in a high place (e.g. motor 22) is removed, transported and installed using special equipment (crane, aerial work vehicle, etc.). It is necessary to perform a large amount of man-hours and costs. Therefore, since it can be said that such a component affects the operation of the facility, the work risk rank increases, that is, the degree of influence index increases. On the other hand, light weight components or low-lying components can be worked without requiring special equipment, so there is little possibility of incurring large man-hours and costs. Therefore, it can be said that such a component does not affect the operation of the equipment so much, so that the work risk rank is low, that is, the degree of influence index is small.

Next, the management device 200 determines the importance of inspection for each component (step S206). Specifically, in Embodiment 2, the importance determination unit 228 of the management device 200 determines the importance of inspection of the component parts according to the MTTR and the work risk. More specifically, the importance determination unit 228 according to the second embodiment determines the importance using the importance determination chart shown in FIG. Here, as will be described below, also in the second embodiment, the importance is determined such that the greater the degree of the influence index, the greater the importance of inspection of the component parts.

FIG. 10 is a diagram exemplifying an importance determination chart according to the second embodiment. In Embodiment 1, the importance of inspection of component parts is determined according to two impact indicators (MTTR and work risk), so the importance determination chart is two-dimensional. In the importance determination chart shown in FIG. 10, three areas ArA, ArB, and ArC are defined according to the length of MTTR and the work risk rank. Area ArA is an area corresponding to "Rank A" with the highest importance of inspection. Area ArB is an area corresponding to "rank B", which indicates that the importance of inspection is medium. Area ArC is an area corresponding to "rank C" with the lowest importance of inspection. Note that the number of importance ranks is not limited to three as shown in FIG. Here, Tr1 and Tr2 are thresholds in MTTR, and Tr1<Tr2. Also, Ra, Rb, and Rc are thresholds in the work risk rank, and Ra>Rb>Rc.

Component parts ranked in rank A are, for example, component parts that cannot be repaired during operation of equipment when a failure occurs, and require a long stoppage that greatly affects production management. Alternatively, it is a structural part for which inspection work is extremely difficult. Therefore, it can be said that the component parts ranked in rank A have a large influence on the production activities of the entire factory. The component parts ranked in rank B are, for example, component parts that need to be stopped for a period of time that does not affect production management in the event of a failure, or component parts that have moderate difficulty in inspection work. be. Therefore, it can be said that the component parts ranked with rank B have less influence on the production activities of the entire factory than the component parts ranked with rank A. Also, component parts ranked in rank C are, for example, component parts that can be repaired while the equipment is in operation (during daily break times, etc.) and whose inspection work is less difficult. Therefore, it can be said that the component parts ranked with rank C have less influence on the production activities of the entire factory than the component parts ranked with rank B.

Here, the area ArA is an area where the MTTR is Tr2 or higher or the work risk rank is Rb or higher. Region ArC is a region where MTTR is less than Tr1 and work risk rank is less than Rc. Area ArB is an area excluding areas ArA and ArC. For example, in the process of S204, when the work risk rank of component X (motor 22) is calculated as Rx (>Rb), the importance determination unit 228 determines the importance of inspection of component X (motor 22). It is judged as rank A. In this case, it means that the effect of the equipment 10 on the failure of the component X is large. Further, for example, when it is calculated that MTTR=MTTR_y (<Tr1) and work risk rank=Ry (<Rc) for the component Y (brake 26) in the process of S204, the importance determination unit 228 (brake 26) is determined to be rank C in terms of importance of inspection. In this case, it means that the influence of the equipment 10 on the failure of the component Y is small.

Further, the candidate calculation unit 230 of the management device 200 according to the second embodiment performs calculation processing of the inspection period candidate Hn in the same manner as in the first embodiment (S208 to S214). In addition, the inspection timing determination unit 232 of the management apparatus 200 according to the second embodiment, in the same manner as in the first embodiment, determines the degree of importance determined in the process of S206 and the inspection period calculated in the process of S210 or S214. Depending on the candidate, the inspection timing of the component parts is determined (S220). Further, the inspection plan output unit 234 of the management device 200 according to the second embodiment generates an inspection plan according to the inspection timing determined in S220 for each component in the same manner as in the first embodiment, and controls the It outputs to the inspection support unit 120 of the device 100 (or the mobile terminal of the worker) (S240). Note that the processes of S208 to S240 are substantially the same as the processes of S108 to S140, respectively, so the description thereof will be omitted.

As described above, the equipment inspection system 1 according to the second embodiment determines the importance of inspection of the component parts of the equipment 10 based on the impact indicators such as MTTR and work risk, and according to the determined importance, It is configured to determine the inspection timing (inspection period) of the component parts. Therefore, also in the equipment inspection system 1 according to the second embodiment, substantially the same effects as those of the equipment inspection system 1 according to the first embodiment can be obtained.

(Modification)
It should be noted that the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the invention. For example, the order of each step in the flowcharts described above can be changed as appropriate. Also, one or more of the steps in the flowchart may be omitted. For example, in the flowchart shown in FIG. 5, the processes of S108 to S114 may be performed before the process of S106. Also, the processing of S108 to S114 may be omitted. These things are the same also in FIG.

Moreover, in the above-described embodiment, MTTR, MTBF, and work risk are given as examples of impact indicators, but the impact indicators are not limited to the above examples. For example, the impact indicator may be availability (=MTBF/(MTBF+MTTR)).

Further, in the above-described embodiment, as shown in FIGS. 6 and 10, two impact indicators are used to determine the importance of inspection. The number is not limited to two. The number of impact indicators used to determine the importance of inspection may be one, or three or more. If the number of impact indicators used to determine inspection importance is one, importance can be determined using a one-dimensional importance determination chart. Also, when the number of impact indicators used to determine the importance of inspection is three, the importance can be determined using a three-dimensional importance determination chart.

Also, in the above-described embodiment, the inspection timing determination unit 232 determines the inspection period for each component. However, the inspection timing determining unit 232 may determine the inspection timing for each component. Specifically, for example, candidates for the inspection timing are calculated in the processing of S110, S114 (S210, S214) for each of the different component parts of the same type (eg, component part X1 and component part X2 in the example of FIG. 4). , S120 (S220), the inspection period may be determined by replacing the "inspection period" with the "inspection period".

Also, in the above examples, the programs can be stored and provided to the computer using various types of non-transitory computer readable media. Non-transitory computer-readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (eg, floppy disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical discs), CD-ROMs, CD-Rs, CD-R/Ws , semiconductor memory (eg, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM). The program may also be delivered to the computer on various types of transitory computer readable medium. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. Transitory computer-readable media can deliver the program to the computer via wired channels, such as wires and optical fibers, or wireless channels.

Reference Signs List 1 equipment inspection system 10 equipment 12 arm 14 joint 20 motor device 22 motor 24 reduction gear 26 Brake 28 Encoder 100 Control device 110 Facility control unit 112 Measurement data acquisition unit 114 Data processing unit 116 Data output unit 120. ... inspection support unit, 122... inspection plan display unit, 124... failure information input unit, 200... management device, 212... data storage unit, 220... inspection plan creation unit, 222... ... failure information acquisition unit, 224 ... failure history storage unit, 226 ... index acquisition unit, 228 ... importance determination unit, 230 ... candidate calculation unit, 232 ... inspection time determination unit, 234... Inspection plan output unit, 236... Spare parts management unit

Claims (6)

an index acquisition unit that acquires at least one influence index that indicates the degree of influence that a failure of a component of equipment has on the operation of the equipment;
an importance determination unit that determines the importance of inspection of the component part based on the impact index;
and an inspection timing determination unit that determines an inspection timing for the component part according to the importance ,
Candidate calculation unit for calculating candidates for inspection timing based on the predicted timing of failure of the component.
further having
The inspection timing determination unit determines that, when the degree of importance is equal to or lower than a predetermined rank and a predetermined periodical replacement time for the component portion arrives earlier than the candidate for the inspection timing, the component portion Equipment inspection system that excludes from inspection items . Each time a failure occurs in said component,
The indicator acquisition unit acquires the impact indicator,
The facility inspection system according to claim 1, wherein the inspection timing determination unit updates the inspection timing of the component. 3. The equipment inspection system according to claim 2, wherein each time a failure occurs in the component, the importance determination unit updates the importance of the component. The impact index includes a first index related to the time required for restoration of the facility having the component when the component fails, and a period from when the component is replaced until the next failure occurs. and a second index relating to the operating time of the facility, having obtaining at least one impact indicator indicating the extent to which a failure of a component of the facility affects operation of the facility;
Based on the impact index, determine the importance of inspection of the component parts,
calculating a candidate inspection time based on the time when the component is predicted to fail;
excluding the component from the inspection items when the degree of importance is equal to or lower than a predetermined rank and the predetermined periodical replacement time for the component is earlier than the candidate for the inspection time;
A facility inspection method for determining inspection timing of the component parts according to the importance. obtaining at least one impact indicator indicating the extent to which a failure of a component of the facility affects operation of the facility;
determining the importance of inspection of the component parts based on the impact index;
a step of calculating a candidate inspection time based on the time when the component is predicted to fail;
a step of excluding the constituent part from the inspection items if the importance is equal to or lower than a predetermined rank and the predetermined periodical replacement time for the constituent part arrives earlier than the candidate for the inspection time; ,
A program for causing a computer to execute a step of determining an inspection time for the component part according to the importance level.

Images